Larval problems and perspectives in life histories of marine invertebrates
Abstract:Research on larval biology and life history strategies of marine invertebrates has been influenced by the perspectives of Thorson's (1946; 1950) categorization of developmental modes and of theoretical models (e.g., r- and K-selection, bet hedging, and energetic trade-offs) which explain demographic patterns. Using these two perspectives, recent developments in five main problems are reviewed: (1) validations and challenges to the perspective that developmental/larval mode primarily determines life history strategies; (2) the significance of variability and flexibility in the larval phase and other aspects of life history strategies; (3) the need for studies of heritability of life history traits; (4) the importance and difficulty of measuring larval mortality; and (5) the need to measure covariation and evolutionary constraints of larval and other life history variables. This review indicates that the analysis of life history strategies of marine invertebrates is in a transition period without a clear new perspective. However, eight recommendations for new research are presented.
Document Type: Research Article
Publication date: September 1, 1986
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